SDL Audio: Set app name hint

pcsx2/Host/SDLAudioStream.cpp

@@ -37,6 +37,9 @@ static bool InitializeSDLAudio(Error* error)
 	if (initialized)
 		return true;
 
+	// Set the name that shows up in the audio mixers on some platforms
+	SDL_SetHint("SDL_AUDIO_DEVICE_APP_NAME", "PCSX2");
+
 	// May as well keep it alive until the process exits.
 	if (SDL_InitSubSystem(SDL_INIT_AUDIO) != 0)
 	{